Question

Select the answer with the correct number of significant figures for each calculation. 31.580 + 4.26 = 35.8 35.84 35.840

Answer 1

The answer is 35.84

When adding using significant figures, you round the answer to the the number of decimal places of the lower-decimal number. 
In this case, 4.26 has the lower number of decimal places (hundredths), so we round to hundredths. 

Answer 2

Answer:

35.84

Explanation:

Next one is 1.0243